Separating device for thrashing machines



July 28, 1 925.

A. W. WHITE- SEPARATING DEVICE FOR THRASHING MACHINES Filed April 10, 1922 3 Sheets-Sheet l July 28, 1925.

A. w. WHITE SEPARATING DEVICE IFOR'TIHRASHJING MACHINES F led April 10. 1 3 sheets'sheet 2 .llllial lnfl. .fl 1 .iiiiisiii. i 1.1 Q w L [ITS/8H t AIM Inf/2126'.

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July 28, 1925. A. w. WHITE SEPARATING DEVICE FOR THRASHING MACHINES Filed April 10.

Patented July 28, 1925.

UNITED STATES ARTHUR WILLIAM WHITE, OF LONDON, ONTARIO, CANADA.

SEPARATING DEVICE FOR THBASHIN'G MACHINES.

Application filed April 10, 1922. Serial No. 551,289.

To all whom it may concern:

Be it known that I, ARTHUR WILLIAM WHITE, a subject of the King of Great Britain, and a resident of the city of London, in the county of Middlesex, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Separating Devices for Thrashing Machines,

of which the following is the specification.

My invention relates to improvements in separating devices for thrashing machines and the object ofthe invention is to construct a machine whereby means is provided for accelerating and agitating the straw as it passes over the straw deck from. the thrashing cylinder towards the rear end of the machine.

A further object is to devise impelling means for agitating and accelerating the straw at different points during the course of its travel over the straw deck whereby the grain is efiiciently separated from the straw, and a still further object is to devise means for imparting a scraping'action on the straw as it passes 05 the straw deck of the machine, said means acting in aretrograde direction to the direction of the straw.

My invention consists of a separating de vice constructed and arranged all as hereinafter more particularly described and illustrated in the accompanying drawing in which:

Fig. 1 represents a perspective view of a machine constructed according to my invention showing the straw deck, thrashing cylinder and the means for operating the straw deck.

Fig. 2 is an enlarged longitudinal section through the straw deck showing the impelling means for accelerating the rearward speed of the straw thereon at different points.

Fig. 3 is a cross section through the line 33 Figure 2 showing the mounting of one of the impelling means.

Fig. 4 is a similar view to Figure 3 showing a modified form of straw impelling means, and

Fig. 5 is a plan view of the modified form of straw deck showing the impelling means constituting sections thereof, of the form illustrated in Figure 4.

Like characters ofreference indicate corresponding parts in the'different views.

1 is the straw deck of the machine provided with the usual spaced cross-slats ,2.

3 are suitably spaced apart toothed longitudlnal racks for preventing the straw movmg in the reverse direction upon the movement of the straw deck 1 in a retrograde direction. 4, 5 and 6 are suitably spaced apart transverse shafts extending freely through the side members 7 of the straw deck and each provided on their outer ends with the depending hangers 8 rigidly secured thereto, said hangers being pivotally mounted on the inwardly extending stub shafts 9 mounted on brackets 10'on the main frame 11 of the thrashing machine. 12 are sets of segmental shaped impellers suitably secured to the respective shafts'4, 5 and 6 and extending freely through longitudinal slots in the straw decks.

14 is a transverse shaft journalled in the side members 7 of the straw deck and provided with the set of segmental impellers 15 secured thereto and extending through longitudinal slots in the straw deck 1. The sets of impellers 12 and 15 have their arc-shaped surfaces toward the forward end of the machine, being secured to the shafts 4, 5, 6 and 14 respectively at their apexes.

16 are rocker arms suitably secured at their upper ends to the transverse shaft 14 and at their lower ends to the transverse shaft 17 which is suitably journalled in the ably secured to the shaft 17 at its upper end and pivotally connected at its lower end to the pitman 19 which is in turn pivotally depending brackets 26 being'mounted on the shaft 27 journalled in the main frame 11 'of the machine. 28 is a depending arm secured to the shaft 27 and the free end of which is pivotally connected to the depending arm 18, by the connecting rod 29.

30 are hangers pivotally connected at their upper ends to the forward end ofthe straw deck 1 and at their lower ends to suitable uprights on the main frame 11.

In the modification illustrated in Figures freely connected eccentrically to the driving wheel j main frame 11. 18 is a depending arm suit- 4 and 5, the side members 7 of the straw deck are not directly connected to the cross slats as is the case in the form illustrated in Figures 1, 2 and 3. They are however, joined together by the end pieces 31 and with them constitute a frame upon which the transverse shafts 4, 5, 6 and 14 are j ournalled in exactly the same manner as above described. In this instance the slatted single straw deck is replaced by the straw deck sections, each comprising the segmental shaped pieces 32 and 33, across each set of which extend the cross slats 34 on their upper faces and also the cross slats 35 on their curved faces.

In this instance the shafts 4, 5 and 6, are connected to the hangers 8 in identicalmannerto that abovedescribed, but the shaft 14, instead of being connected to the rocker "arms 16, has secured thereto at their upper ends the hangers 36, which are pivotally mounted at their lower ends on the main frame 11. In the modified form the rocking action to the straw deck is imparted by means of the cross shaft 37 being journalled onthemain frame 11 and having mounted thereon the rocker arms 38, said rocker arms extending above and below the shaft and their-lower arms being shorter than their upper arms. Th lower arms are pivotally connected to the grain deck 22 and the up- :per or longer arms of the rocker arms 38 are pivotally connected to the straw deck 1.

The depending arm 18 is now connected to the end of the cross shaft 37 and the pitman 19 pivotally connected to such arm as above described.

I will now describe the operation of my machine:

When the driving wheel '20 is rotated, the depending arm 18-is reciprocated and consequently the rocker arms 16 are oscillated and the straw deck rocked back and forth.

As it is rocked rearwardly, and on the hangers 8 being moved into the position illustrated in Figure 2, it will be seen that the shafts 4, 5, 6 and 14 will be turned a certain extent and consequently the segmental agitating impellers 12 and 15, are projected up through the slots in the straw deck, thus impelling the straw rearwardly =thereon. As the straw passe-s onto the straw deck from the thrashing cylinder and passes over the first set of impellers 15, the impact of these impellers on the straw will accelerate the speed of the sameas well as having an agitating eflect thereon in order to efficiently separate the straw. Now as the straw passes further on towards the rear of the machine it is struck again by the different sets of impellers 12, which as above described are actuated by the shafts 4, 5 and 6 being turned by the movement of the hangers into the position illustrated in Figure 2. Thus the straw which passes onto :thestraw deck from the thrashing cylinder is greatly increased in speed as it passes off such deck at the rear end. 7

In passing off the rear end of the straw deck it is scraped by the slatted member 23 which is rocked by the means above described and any grain that may have been held in the straw is freed therefrom and passes down the subsidiary grain deck 25 onto the main grain deck 22. As the straw deck has only a short travel in its rocking motion, sufficient to work the agitating'iinpellers, I depend to a 'very marked extent on the impellersfor the deliveryof the straw tothe rear end of the machine.

In the-modified form illustrated in Figures 4 and *5 instead of an integral straw deck being used with the impellers operatingtherethrough, I divide the straw deck into a series of sections and mount the cross slats on ther segmentalpieces 32 and 33, which correspond respectively to the sets ofimpellers 15 and'12, the cross slats in this instance being'securedto the upper faces of the impellers, and'in addition the cross slats 35 being provided on the curvedfa ces of the impellers in order to prevent the straw dropping down betweenthe sections as it is impelled rearwardly over the sectional straw deck.

The operation of this modified form is, in

principle, identical with that above described, the only difference being the use of a double ended rocker arm for actuating-the straw deck in one direction and the grain deck in the reverse direction. As the sectional straw deck is rocked into the position illustrated in Figure 4, the sections will be swung up into the position illustrated whereby the straw is struck with considerable force and impelled rearwardly, the slats 35 giving a lifting action to the straw and preventing it'getting down between the different sections.

From theabove description it will be seen that Ihave devised a simpleand efiective and actuated upon the reciprocation thereof, said sets of impellers disposed longitudinally at suitable intervals in the deck and suitably spaced cross slats extending between the impellers of each set on their up per and curved faces.

2. In separating devices for thrashing machines, the combination with the reciprocable strawdeck, of a; plurality of impelling means disposed longitudinally at suitable intervals in the deck for agitating and accelerating the speed of the straw passing thereover, said impelling means actuated upon the reciprocation of the deck, means for reciprocating the deck, impelling means carried by such means for imparting the initial agitation and acceleration to the straw passing over the deck, and means situated at the rear end of the straw deck 10 for imparting a retarding and scraping motion on the straw upon its passing off such straw deck, said scraping means actuated by the deck reciprocating means.

ARTHUR WILLIAM WHITE.- 

